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Plant Theory Organic Multi-Purpose Fertiliser Concentrate

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Give your plants the organic treatment

Plant Theory multi-purpose fertiliser is a careful blend of seaweed and plant extracts, perfectly balanced to provide essential minerals and nutrients to vegetables, flowers, fruits, salad crops and even house plants. We've created it as a concentrate to minimise the packaging required, so one little sachet is all you need to make up a whole litre of plant-improving solution.

Seaweed contains natural plant nutrients such as Nitrogen and Potassium to improve plant immunity, enrich soil and provide strong and healthy growth

Please Note: Keep out of reach of children

  • Organic, based on all-natural seaweed
  • One sachet makes 1 litre of plant food solution
  • Concentrated fertiliser means less packaging and less waste
  • Compound fertiliser UK Fertiliser Declaration
  • NPK ratio 4-2-4
  • Total Nitrogen (N) 4%
  • Phosphorous Pentoxide P205 soluble 2%
  • Potassium Oxide k2O 4%
Easy to use!

To use the fertiliser, it's as simple as 1,2,3.

  1. Cut sachet open
  2. Add to 1 litre of water
  3. Apply the fertiliser solution to your hungry plants!

Feed outdoor plants once a week during the growing season, and feed pot plants twice a week. Avoid scorching by watering early or late in the day - easy!

Primrose is the place to be to Discover Everything Garden.

We were created in 2003 to become the UK's largest online-only garden centre. Thousands of plants, planters, awnings, garden furniture sets, water features and more line our digital shelves, and we're ready to fill your garden with comfort, quality, colour and style.

If you'd like to find out more, check out our 'About Us' page.

We want you to be happy with your purchase from the moment it arrives, but if you aren't you have the right to return it within 14 days. Just head to our Returns Page, send us an email, receive a returns number and fire your product back to us.

We'll refund the full cost as well as standard delivery.

Highlands and Islands

We calculate delivery costs at checkout based on your entered postcode, so you'll know at that stage if your chosen product can be sent to you. If you have any queries, please head to Contact Us and send over a form, or visit our Help Centre.

Enjoy now, pay later! Spread the cost of any Primrose purchase with one of our partner finance options. You can plant now, pay later, lounge in your furniture now and pay next month, or even redesign your whole garden and pay next year!

More Information
Is Collection/Mix? No
Needs Ericaceous Compost? No
Type Fertiliser
Fertiliser Type Liquid
Shop By Category Compost & Fertiliser